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onsemi 1.5KE7.5A
- Part No.:
- 1.5KE7.5A
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AE, Axial
- Datasheet:
-
1.5KE7.5A.pdf
- Description:
- TVS D5.4X7.5 6.4V 1500W UNIDIR
- Quantity:
- Payment:
- Shipping:
Inventory:3,262
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Product details
Overview
1.5KE7.5A from ON Semiconductor is a unidirectional 1500 W transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics. It features a 6.4 V working peak reverse voltage (VRWM), 7.5 V nominal breakdown voltage (VBR), 11.3 V clamping voltage (VC) at 132 A peak pulse current, and sub-1 ns response time - deployed in power supplies, industrial controls, and medical equipment to protect CMOS/MOS/Bipolar ICs from ESD and surge transients.
For engineers reviewing the 1.5KE7.5A datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM margin over operating voltage, VC vs. device withstand capability, UL 497B certification for isolated loop protection, and axial lead (Case 41A) thermal derating above 75°C.
Technical Context
The 1.5KE7.5A operates as a unidirectional Zener-based TVS diode with avalanche breakdown behavior. Its clamping action begins at VBR = 7.13–7.88 V (tested at IT = 10 mA), limits transient energy via 1500 W peak pulse power (1 ms), and maintains low dynamic impedance under surge conditions.
It complies with UL 497B for isolated loop circuit protection and achieves Class 3 ESD immunity (>16 kV HBM). The device uses Surmetic axial-leaded plastic packaging (Case 41A), with cathode polarity marked by a band and maximum soldering temperature of 260°C at 1/16″ from case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - defines maximum single-event surge energy absorption without failure |
| Working Peak Reverse Voltage | 6.4 V - maximum continuous DC or peak AC voltage the device blocks before clamping |
| Breakdown Voltage | 7.13–7.88 V @ 10 mA - voltage at which avalanche conduction initiates; sets clamping onset threshold |
| Clamping Voltage | 11.3 V @ 132 A - maximum voltage seen by protected circuit during full-rated surge event |
| Leakage Current | <500 nA @ 6.4 V - ensures minimal power loss and signal interference in standby operation |
| Response Time | <1 ns - enables suppression of fast-rising transients before downstream components are stressed |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for high-reliability environments with frequent human handling |
Pinout & Package
1.5KE7.5A uses an axial-leaded plastic package (ON Semiconductor Case 41A), with cathode identified by a colored band. Leads are tin-plated, corrosion-resistant, and solderable per J-STD-020. Maximum lead temperature is 260°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side of protected line; forms return path during clamping |
| Cathode | Current exit terminal during reverse-biased clamping | Marked with polarity band; connected to higher-potential rail (e.g., VIN) to shunt surges to ground |
Key Features
| Feature | Design Value |
|---|---|
| UL 497B Recognition | Validated for isolated loop circuit protection - meets strike voltage, endurance, dielectric withstand, and discharge test requirements |
| Low Clamping Ratio | VC/VBR ≈ 1.5 - tight ratio minimizes overvoltage stress on protected ICs during surge events |
| Pb-Free Packaging | RoHS-compliant Surmetic axial lead (1.5KE7.5AG/1.5KE7.5ARL4G) - supports lead-free assembly without requalification |
| Thermal Robustness | RJL = 20°C/W - enables effective heat transfer from junction to lead, supporting 5.0 W steady-state dissipation at TL ≤ 75°C |
Applications
| Industrial Power Supply Protection | Medical Equipment Surge Suppression |
|---|---|
Use Scenario: Input stage of AC/DC front-end where lightning-induced surges or inductive switching spikes threaten rectifier bridges and controller ICs. IC Role / Device Role / Timing Role: Unidirectional parallel clamp across DC bus or AC input lines - activates only during overvoltage, remaining high-impedance otherwise. Use Value: Limits transient voltage to ≤11.3 V, preventing latch-up or gate oxide rupture in downstream MOSFETs and PWM controllers rated for 12–15 V absolute max. | Use Scenario: Signal/power interface between patient-connected sensors and isolated data acquisition modules in diagnostic devices. IC Role / Device Role / Timing Role: UL 497B-certified protector on isolated analog input channels - suppresses ESD and defibrillator-induced transients while maintaining galvanic separation integrity. Use Value: Enables compliance with IEC 60601-1 third-edition surge immunity requirements without compromising isolation barrier performance. |
| Process Control I/O Protection | Communication System DC Rail Clamp |
Use Scenario: 24 V DC fieldbus interfaces (e.g., Profibus, CAN physical layer) exposed to cable coupling and ground potential differences. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; 1.5KE7.5A used in unidirectional configuration to clamp positive transients on supply rails feeding optocouplers and level shifters. Use Value: Maintains <500 nA leakage at 6.4 V, avoiding false triggering or bias drift in precision current-loop receivers. | Use Scenario: +5 V or +3.3 V distribution rail in telecom line cards subject to hot-swap transients and backplane coupling noise. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) clamp placed adjacent to ASIC power pins - responds within 1 ns to limit overshoot during rapid load changes. Use Value: Delivers 132 A peak pulse current capacity, sufficient to absorb multiple 10/1000 µs surges per IEC 61000-4-5 Level 4 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Surface-mount SMB package (vs. axial); 7.0 V VRWM; 11.2 V VC @ 103 A; 600 W rating | Lower power rating and smaller footprint - suited for space-constrained PCBs but less robust for high-energy surges | Select when board area is critical and surge threat level is moderate (e.g., consumer-grade Ethernet ports) |
| 1N6267A | JEDEC-registered equivalent; identical electrical specs; same Case 41A axial package; legacy marking | No functional difference - direct form-fit-function replacement with identical thermal and mechanical behavior | Choose for legacy design continuity or when sourcing from distributors listing JEDEC nomenclature |
Compared with SMBJ7.0A, 1.5KE7.5A offers 2.5× higher surge power and proven axial-lead thermal reliability; versus 1N6267A, it shares identical performance but uses updated ON Semiconductor part numbering and Pb-free compliance labeling.
Availability
1.5KE7.5A is available at Aetrix Electronics and suitable for industrial power supplies, medical instrumentation, process control I/O modules, and telecom DC rail protection requiring stable component supply across long production lifecycles.
Supply support for 1.5KE7.5A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
ON Semiconductor (now onsemi) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1.5KE7.5A belongs to the 1.5KE Series Mosorb TVS family - engineered for high-reliability, high-energy transient suppression in harsh environments where UL recognition, low clamping ratio, and axial thermal performance are critical.
FAQ
What is the working peak reverse voltage (VRWM) of the 1.5KE7.5A?
The 1.5KE7.5A has a working peak reverse voltage (VRWM) of 6.4 V, meaning it reliably blocks voltages up to this level in normal operation while remaining non-conductive. This value ensures compatibility with 5 V systems where a safety margin above nominal rail voltage is required before clamping initiates. Exceeding VRWM triggers avalanche breakdown, and the device clamps at 11.3 V when subjected to its rated 132 A surge current.
How does the 1.5KE7.5A differ from bidirectional TVS diodes?
The 1.5KE7.5A is strictly unidirectional - it conducts only during positive voltage transients relative to its cathode, making it ideal for DC rail protection where polarity is fixed. Unlike bidirectional variants (e.g., 1.5KE7.5CA), it provides no suppression for negative-going surges. Its asymmetrical IV curve delivers tighter clamping on the intended polarity and lower leakage at VRWM, which is essential in precision analog or low-power standby circuits using the 1.5KE7.5A.
Is the 1.5KE7.5A certified for UL 497B, and what does that mean for system design?
Yes, the 1.5KE7.5A carries UL 497B recognition (File #E210057) for isolated loop circuit protection. This certification confirms successful testing for strike voltage breakdown, endurance conditioning, temperature stability, dielectric withstand, and discharge performance - enabling use in safety-critical telecom and medical isolation barriers without additional external validation. Designers can cite this directly in regulatory submissions for IEC 62368-1 or IEC 60601-1 compliance when deploying the 1.5KE7.5A.
What is the thermal derating behavior of the 1.5KE7.5A above 75°C?
The 1.5KE7.5A is rated for 5.0 W steady-state power dissipation at lead temperature (TL) ≤ 75°C, with linear derating of 20 mW/°C above that point. At TL = 100°C, its usable continuous power drops to 4.5 W. This behavior stems from its thermal resistance of 20°C/W (junction-to-lead), and must be accounted for in enclosed power supplies or high-ambient industrial enclosures where airflow is limited - ensuring the 1.5KE7.5A remains within safe operating limits during sustained leakage or repeated low-energy transients.
Can the 1.5KE7.5A be used in place of the 1N6267A?
Yes, the 1.5KE7.5A is functionally and mechanically identical to the 1N6267A - sharing the same Case 41A axial package, electrical specifications (6.4 V VRWM, 7.5 V VBR, 11.3 V VC), and UL 497B certification. The "1.5KE" prefix reflects ON Semiconductor's proprietary part numbering, while "1N6267A" is the JEDEC-standard designation. Both are manufactured to the same 1N6267A Series specification sheet, making the 1.5KE7.5A a direct replacement with no design or layout changes required.
1.5KE7.5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AE, Axial
- Series:
- 1.5KE
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 132A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE7.5A FAQ
1.How can I place an order for 1.5KE7.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE7.5A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5KE7.5A reliable?
The price and inventory of 1.5KE7.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE7.5A is usually 5 days.
3.What payment methods are accepted for 1.5KE7.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE7.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE7.5A?
1.5KE7.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE7.5A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5KE7.5A?
For technical support, including 1.5KE7.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE7.5A requirements.
6.How does Aetrix verify that 1.5KE7.5A is sourced from the original manufacturer or authorized distributors?
All 1.5KE7.5A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5KE7.5A meets industry standards.
7.What is the process for return or replacement of 1.5KE7.5A?
All 1.5KE7.5A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE7.5A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5KE7.5A part is unused and in its original packaging.
Return procedure for 1.5KE7.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE7.5A Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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